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-   -   Furnace does not stop running (https://www.askmehelpdesk.com/showthread.php?t=412693)

  • Nov 4, 2009, 11:09 AM
    kramer850
    Furnace does not stop running
    Hello, I am having problems with my furnace. It just stays on. The t-stat seems to have no control on the furnace. I actually disconnected it and the furnace still just keeps running. It's a slant fin furnace with a beckett oil burner model AFG. If that helps at all. The only way to control it is to turn off the master switch. I usually turn it on for an hour or two then off till needed again. Thank you for any info.
  • Nov 4, 2009, 11:14 AM
    hvac1000
    Disconnect one of the thermostat wires from the burner control. Usually a R red or W white wire will do. If the unit stops running you have a thermostat wire or thermostat problem. If the unit keeps running after disconnecting one of the thermostat wires then you have a burner safety control problem.

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